Explore chemistry concepts using a variety of free resources, including video lessons and demos, labs and activities, worksheets and games:

1. American Chemical Society has lesson units and activities for elementary, middle school, and high school chemistry that can be downloaded for free:

Inquiry in Action: Elementary through middle school students learn key concepts through a series of activities.

Middle School Chemistry: Six chapters of lesson plans can be downloaded covering matter, changes of state, density, the periodic table and bonding, the water molecule, and chemical change. Each chapter includes animations and activities.

2. GPB Education: Georgia Public Broadcasting provides free fundamentals of chemistry and physics courses for high school students. The content is delivered through 30-minute video lessons, and accompanying note-taking guides and worksheets.

3. Creative Chemistry: This site provides PDF worksheets and guides, and PowerPoints on a number of chemistry topics. There’s a molecules section that allows you to view and manipulate molecular models, and a section with chemistry games and puzzles.

4. Chemistry Now: A weekly, online video series that explores the science of the everyday. The short (5-minute) programs explain the chemistry behind ordinary objects and occurrences, such as cheeseburgers and chocolate, changing leaves and the fear response. The series also takes a look at chance discoveries in chemistry (like Kevlar) , and the work of today’s top scientists.

6. Periodic Table of Videos: As its name implies, this site is a modern version of the Periodic Table of Elements, with short videos explaining each element’s significance and how they’re used.

7. goREACT: From the Chicago Museum of Science and Industry, this site lets you create virtual chemical reactions by dragging elements from the periodic table to a “reaction area."

8. Chemical Symbols Game: This game is designed to help players identify the first 92 elements by their symbols. Players must combine the correct elements in the "reactor" to make various compounds. Scroll to the bottom of the page for more links on chemical equations and the periodic table.